EP0771997B1 - Lamp cover - Google Patents
Lamp cover Download PDFInfo
- Publication number
- EP0771997B1 EP0771997B1 EP96115779A EP96115779A EP0771997B1 EP 0771997 B1 EP0771997 B1 EP 0771997B1 EP 96115779 A EP96115779 A EP 96115779A EP 96115779 A EP96115779 A EP 96115779A EP 0771997 B1 EP0771997 B1 EP 0771997B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lamp
- lamp cover
- hollow body
- protective layer
- acrylate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V3/00—Globes; Bowls; Cover glasses
- F21V3/04—Globes; Bowls; Cover glasses characterised by materials, surface treatments or coatings
Definitions
- the invention relates to a lamp cover made of a transparent thermoplastic Plastic, with a protective coating to absorb ultraviolet radiation.
- Usual lamp covers of this type use plastics under the influence UV rays become more and more brittle over time, making them fragile and also turn yellow. Therefore, such, especially outdoors used lamp covers an outer layer protecting against UV rays.
- the lamp cover forms a closed one, especially in the case of outdoor lights Chamber in which there is practically no exchange of air with the outside air. So build very high ozone concentration inside the lamp cover, causing Ozone aging processes can be accelerated.
- This also includes the material of the wall body the lamp cover affected, which are aggressive when using new lamps Influences not only from the outside, but also from the inside, and not only due to UV rays, but also due to the high concentration of ozone Air inside the lamp cover.
- EP-A-0 177 034 is an acrylic resin coating e.g. for the headlights one Motor vehicle described. It has a 2-layer structure from a primer and a hard layer applied over it, at least the primer one Has UV absorber portion (triazole) of 0.5 to 50 wt .-% and thereon a curable Silicon dioxide or methyl sesquisiloxane coating is necessary.
- UV absorber portion triazole
- the object of the invention is seen in translucent lamp covers in the form of externally coated plastic hollow body in a closed chamber contain a UV radiation and / or ozone source, also in front of a lamp in the Interior outgoing adverse and particularly destructive influences well to protect. Naturally, the aim is to minimize light losses in order to to get the most effective lighting fixture that is also permanently reliable should work.
- Lamp cover made of a transparent thermoplastic, with a Protective coating for absorbing ultraviolet radiation is according to the invention provided that the lamp cover is a spherical hollow body with only one Opening for inserting a lamp and for attaching it to a lamp holder, that on the outer surface of the hollow body, a protective layer made of UV radiation absorbent acrylate is present and that additionally with the inside of the Hollow body has an inner protective layer made of both UV radiation absorbing as well as ozone-impermeable acrylate is connected in one piece. How to get Lamp covers, thanks to their special coating, high lighting effectiveness own and also provide reliable long-term use outdoors.
- the present invention brings about an additional one UV and ozone protection through internal coating of a one-piece, spherical Hollow body with only one opening for inserting a lamp and Attach to a light carrier, such hollow bodies each being a closed one Form chamber in which UV and ozone effects gradually destroy materials would trigger what is largely prevented according to the invention.
- the feature of claim 2 further contributes to this because the area close to the lamp passes through the coating thickened there is protected all the better.
- Such a variation of the Layer thickness is not apparent from the prior art, especially since the invention allows through the only opening of the otherwise closed hollow body, that is a spherical lamp, the coating material in it in a certain way distribute that he can perform the function assigned to him.
- the translucent hollow body is a one-piece molding Polycarbonate, polyamide or polyethylene, which is cheap to manufacture and in Use is beneficial.
- the drawing shows a spherical lamp cover with a partial sectional view through the wall.
- Your wall body 1 is designed as a molded part produced, for example, in a rotary fusion process known per se from a thermoplastic, for example a polycarbonate.
- a protective layer 2 made of a UV-ray-absorbing acrylate is provided on its outer surface in a manner known per se.
- An inner protective layer 3 is additionally arranged as a protective element against destructive influences emanating from the lamp, in addition to the UV rays, in particular also from the extremely high ozone concentration. This also consists of an acrylate, which is also impermeable to ozone due to its UV-absorbing effect.
- the lamp cover has only one opening 4 for the introduction of the lamp and for attachment to a lamp holder.
- the objectification of the idea of the invention is not limited to the embodiment described above.
- the wall body can also be made from another Material, e.g. a polyamide or polyethylene. He can go after another Processes, e.g. a known injection blow molding process be produced as a one-piece molded part.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
- Securing Globes, Refractors, Reflectors Or The Like (AREA)
- Physical Water Treatments (AREA)
Description
Die Erfindung betrifft eine Lampenabdeckung aus einem transparenten thermoplastischen Kunststoff, mit einer Schutzbeschichtung zum Absorbieren von Ultraviolett-Strahlung.The invention relates to a lamp cover made of a transparent thermoplastic Plastic, with a protective coating to absorb ultraviolet radiation.
Übliche Lampenabdeckungen dieser Art verwenden Kunststoffe, die unter der Einwirkung von UV-Strahlen im Laufe der Zeit mehr und mehr verspröden, somit zerbrechlich werden und außerdem vergilben. Deshalb haben derartige, insbesondere im Freien verwendete Lampenabdeckungen eine vor UV-Strahlen schützende Außenschicht. Die neuerdings mit zunehmender Verbreitung in den Verkehr kommenden Halogenlampen, namentlich Quecksilberdampflampen erzeugen ebenfalls UV-Strahlen. Sie bewirken damit in erheblichem Ausmaß eine Ozonisierung der die Lampe umgebenden Luft. Insbesondere bei Außenleuchten bildet die Lampenabdeckung eine geschlossene Kammer, in der praktisch kein Luftaustausch mit der Außenluft erfolgt. So baut sich innerhalb der Lampenabdeckung eine sehr hohe Ozonkonzentration auf, wodurch Ozon-Alterungsprozesse beschleunigt werden. Davon ist auch das Material des Wandkörpers der Lampenabdeckung betroffen, die beim Einsatz neuer Leuchtmittel aggressiven Einflüssen nicht bloß von außen, sondern auch von innen ausgesetzt ist, und zwar nicht nur durch UV-Strahlen, sondern auch durch hohe Ozonkonzentration der Luft innerhalb der Lampenabdeckung. Usual lamp covers of this type use plastics under the influence UV rays become more and more brittle over time, making them fragile and also turn yellow. Therefore, such, especially outdoors used lamp covers an outer layer protecting against UV rays. The recently with increasing use of halogen lamps on the market, mercury vapor lamps, in particular, also generate UV rays. They effect thus a considerable degree of ozonization of the air surrounding the lamp. The lamp cover forms a closed one, especially in the case of outdoor lights Chamber in which there is practically no exchange of air with the outside air. So build very high ozone concentration inside the lamp cover, causing Ozone aging processes can be accelerated. This also includes the material of the wall body the lamp cover affected, which are aggressive when using new lamps Influences not only from the outside, but also from the inside, and not only due to UV rays, but also due to the high concentration of ozone Air inside the lamp cover.
Der Stand der Technik kennt Beschichtungen der verschiedensten Art. Beispielsweise ist in EP-A-0 177 034 eine Acrylatharz-Beschichtung z.B. für die Vorderlampen eines Kraftfahrzeugs beschrieben. Sie hat einen 2-Schichten-Aufbau aus einer Grundierung und einer darüber aufgebrachten Hartschicht, wobei zumindest die Grundierung einen UV-Absorber-Anteil (Triazol) von 0,5 bis 50 Gew.-% aufweist und darauf ein aushärtbarer Siliziumdioxid- oder Methylsesquisiloxan-Überzug notwendig ist. Aus dieser technischen Lehre, wie Scheinwerfer-Abdeckungen bzw. -Linsen mit einer Doppelschicht überzogen werden, ist selbst dort, wo unebene Flächen beschichtet wurden, dies nur auf Außenflächen und in gleichmäßigem Materialauftrag zu entnehmen.The prior art knows a wide variety of coatings. For example EP-A-0 177 034 is an acrylic resin coating e.g. for the headlights one Motor vehicle described. It has a 2-layer structure from a primer and a hard layer applied over it, at least the primer one Has UV absorber portion (triazole) of 0.5 to 50 wt .-% and thereon a curable Silicon dioxide or methyl sesquisiloxane coating is necessary. For this technical Teaching how headlamp covers or lenses with a double layer Even where uneven surfaces have been coated, this is only possible can be removed from the outside and in an even application of material.
Eine andersartige Beschichtung sieht die US-A-5 314 741 vor, und zwar auf einem verformbaren Nitrilkautschuk-Träger, der mit einem zuerst hydrierten und dann als Emulsion aufgetragenen Latex-Polymer als Schutzschicht für Flachkörper, Schläuche, Kraftstofftanks, Fahrzeugreifen u.dgl. beschichtet wird. Diese Druckschrift befaßt sich aber nicht mit thermoplastischen Lampenabdeckungen.A different type of coating is provided in US-A-5 314 741, on one deformable nitrile rubber backing, which is initially hydrogenated and then as Emulsion applied latex polymer as a protective layer for flat bodies, hoses, Fuel tanks, vehicle tires and the like is coated. This document deals with but not with thermoplastic lamp covers.
Die Aufgabe der Erfindung wird darin gesehen, lichtdurchlässige Lampenabdeckungen in Form außenbeschichteter Kunststoff-Hohlkörper, die in einer geschlossenen Kammer eine UV-Strahlungs- und/oder Ozonquelle enthalten, auch vor von einer Lampe im Innenraum ausgehenden nachteiligen und insbesondere zerstörerischen Einflüssen gut zu schützen. Dabei wird naturgemäß angestrebt, Lichtverluste zu minimieren, um einen möglichst effektiven Beleuchtungskörper zu erhalten, der zudem dauerhaft zuverlässig funktionieren soll.The object of the invention is seen in translucent lamp covers in the form of externally coated plastic hollow body in a closed chamber contain a UV radiation and / or ozone source, also in front of a lamp in the Interior outgoing adverse and particularly destructive influences well to protect. Naturally, the aim is to minimize light losses in order to to get the most effective lighting fixture that is also permanently reliable should work.
Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst. Bei einer Lampenabdeckung aus einem transparenten thermoplastischen Kunststoff, mit einer Schutzbeschichtung zum Absorbieren von Ultraviolett-Strahlung, ist erfindungsgemäß vorgesehen, daß die Lampenabdeckung ein kugelförmiger Hohlkörper mit nur einer Öffnung zum Einführen einer Lampe und zum Befestigen an einem Lampenträger ist, daß auf der Außenfläche des Hohlkörpers eine Schutzschicht aus einem UV-Strahlung absorbierenden Acrylat vorhanden ist und daß zusätzlich mit der Innenseite des Hohlkörpers eine innere Schutzschicht aus einem sowohl UV-Strahlung absorbierenden als auch ozonundurchlässigen Acrylat einstückig verbunden ist. So erzielt man Lampenabdeckungen, die dank ihrer besonderen Beschichtung hohe Leuchteffektivität besitzen und auch im Freien zuverlässigen Langzeit-Einsatz leisten. This object is solved by the features of claim 1. At a Lamp cover made of a transparent thermoplastic, with a Protective coating for absorbing ultraviolet radiation is according to the invention provided that the lamp cover is a spherical hollow body with only one Opening for inserting a lamp and for attaching it to a lamp holder, that on the outer surface of the hollow body, a protective layer made of UV radiation absorbent acrylate is present and that additionally with the inside of the Hollow body has an inner protective layer made of both UV radiation absorbing as well as ozone-impermeable acrylate is connected in one piece. How to get Lamp covers, thanks to their special coating, high lighting effectiveness own and also provide reliable long-term use outdoors.
Die vorliegende Erfindung bewirkt im Gegensatz zum Stand der Technik einen zusätzlichen UV- und Ozon-Schutz durch Innenbeschichtung eines einstückigen, kugelförmigen Hohlkörpers mit lediglich einer Öffnung zum Einführen einer Lampe und zum Befestigen an einem Leuchtenträger, wobei solche Hohlkörper jeweils eine geschlossene Kammer bilden, in der UV- und Ozon Einwirkungen nach und nach Materialzerstörungen auslösen würden, was erfindungsgemäß weitestgehend verhindert wird.In contrast to the prior art, the present invention brings about an additional one UV and ozone protection through internal coating of a one-piece, spherical Hollow body with only one opening for inserting a lamp and Attach to a light carrier, such hollow bodies each being a closed one Form chamber in which UV and ozone effects gradually destroy materials would trigger what is largely prevented according to the invention.
Dazu trägt das Merkmal von Anspruch 2 weiter bei, weil der lampennahe Bereich durch
die dort verdickte Beschichtung umso besser geschützt wird. Eine solche Variation der
Schichtdicke ist aus dem Stand der Technik nicht ersichtlich, zumal die Erfindung es
ermöglicht, durch die einzige Öffnung des im übrigen geschlossenen Hohlkörpers, also
einer Kugelleuchte, den Beschichtungs-Werkstoff darin in bestimmter Weise so zu
verteilen, daß er die ihm zugewiesene Funktion ausüben kann.The feature of
Laut Anspruch 3 ist der lichtdurchlässige Hohlkörper ein einstückiges Formteil aus Polycarbonat, Polyamid oder Polyethylen, was fertigungstechnisch günstig und im Gebrauch vorteilhaft ist.According to claim 3, the translucent hollow body is a one-piece molding Polycarbonate, polyamide or polyethylene, which is cheap to manufacture and in Use is beneficial.
Die Erfindung wird im folgenden näher erläutert. Anhand einer Zeichnung wird ein Ausführungsbeispiel beschrieben. The invention is explained in more detail below. Using a drawing, a Described embodiment.
Die Zeichnung zeigt mit teilweisem Schnittbild durch
die Wand eine kugelförmige Lampenabdeckung.
Ihr Wandkörper 1 ist als ein beispielsweise in einem an
sich bekannten Rotationsschmelzverfahren aus einem thermoplastischen
Kunststoff, z.B. einem Polycarbonat, hergestelltes
Formteil ausgebildet. Auf ihrer Außenfläche ist
in an sich bekannter Weise eine Schutzschicht 2 aus einem
UV-Strahlen absorbierenden Acrylat vorgesehen.
Als Schutzelement gegen von der Lampe ausgehende, außer
von den UV-Strahlen insbesondere auch von der extram
hohen Ozonkonzentration beruhenden zerstörenden Einflüssen
ist zusätzlich eine innere Schutzschicht 3 angeordnet.
Diese besteht ebenfalls aus einem Acrylat, welches
bei seiner UV-Strahlen absorbierenden Wirkung auch
Ozon-undurchlässig ist. Die Lampenabdeckung weist nur
eine Öffnung 4 zur Einführung der Lampe und zur Befestigung
an einem Leuchtenträger auf.The drawing shows a spherical lamp cover with a partial sectional view through the wall. Your wall body 1 is designed as a molded part produced, for example, in a rotary fusion process known per se from a thermoplastic, for example a polycarbonate. A
Die Vergegenständlichung des Erfindungsgedankens ist nicht auf das vorstehend beschriebene Ausführungsbeispiel beschränkt. Der Wandkörper kann auch aus einem anderen Material, z.B. einem Polyamid oder Polyethylen bestehen. Er kann nach einem anderen Verfahren, z.B. einem an sich bekannten Spritz-Blasverfahren als einstückiges Formteil hergestellt sein.The objectification of the idea of the invention is not limited to the embodiment described above. The wall body can also be made from another Material, e.g. a polyamide or polyethylene. He can go after another Processes, e.g. a known injection blow molding process be produced as a one-piece molded part.
Claims (3)
- Lamp cover of a transparent thermoplastic material, including protective coating for absorbing ultra-violet radiation, wherein the lamp cover is a ball-shaped hollow body (1) having only one aperture (4) for introducing a lamp and for fixation to a lantern support, wherein the outer surface of the hollow body (1) comprises a protective layer (2) of an acrylate that absorbs ultra-violet radiation and wherein, in addition, an inner protective layer (3)of an acrylate that both absorbs ultra-violet radiation and is impermeable for ozone is integrally joined to the interior wall of the hollow body (1).
- Lamp cover according to claim 1, wherein the inner protective layer (3) is thicker in a region closer to the lamp than in regions farther from the lamp.
- Lamp cover according to claim 1 or claim 2, wherein the hollow body (1) is an integral moulding of polycarbonate, polyamide or polyethylene.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29517444U | 1995-11-03 | ||
| DE29517444U DE29517444U1 (en) | 1995-11-03 | 1995-11-03 | Lamp cover |
| JP7292967A JPH09139108A (en) | 1995-11-03 | 1995-11-10 | Illuminating lamp chimney |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0771997A1 EP0771997A1 (en) | 1997-05-07 |
| EP0771997B1 true EP0771997B1 (en) | 2003-02-05 |
Family
ID=26058359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP96115779A Expired - Lifetime EP0771997B1 (en) | 1995-11-03 | 1996-10-02 | Lamp cover |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0771997B1 (en) |
| JP (1) | JPH09139108A (en) |
| DE (2) | DE29517444U1 (en) |
| ES (1) | ES2191074T3 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10310557B4 (en) * | 2003-03-11 | 2011-07-21 | Heinrich Strunz GmbH, 95111 | Skylight with artificial light source |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU424121B2 (en) * | 1969-06-23 | 1972-05-15 | K-S-H, Inc | Light transmitting panel |
| US3949258A (en) * | 1974-12-05 | 1976-04-06 | Baxter Laboratories, Inc. | Method and means for suppressing ozone generated by arc lamps |
| JPS6186259A (en) * | 1984-10-05 | 1986-05-01 | 日産自動車株式会社 | Plastic member with surface hardened film |
| JPH0612906A (en) * | 1992-03-16 | 1994-01-21 | Yokohama Kiko Kk | Luminaire suitable for art object, and the like |
| JPH05325611A (en) * | 1992-05-25 | 1993-12-10 | Toshiba Lighting & Technol Corp | Reflector |
| JPH05325612A (en) * | 1992-05-26 | 1993-12-10 | Dainippon Ink & Chem Inc | Lamp reflector |
| JPH06111612A (en) * | 1992-09-25 | 1994-04-22 | Sumitomo Chem Co Ltd | Resin plate body for illumination |
| US5314741A (en) * | 1992-10-07 | 1994-05-24 | The Goodyear Tire & Rubber Company | Rubber article having protective coating |
| JP2579350Y2 (en) * | 1992-10-09 | 1998-08-27 | シチズン時計株式会社 | Illumination device and liquid crystal display device using the same |
| JPH0658509U (en) * | 1993-01-18 | 1994-08-12 | スタンレー電気株式会社 | lighting equipment |
| JPH07220514A (en) * | 1994-02-04 | 1995-08-18 | Sekisui Chem Co Ltd | Manufacture of light diffusion plate |
-
1995
- 1995-11-03 DE DE29517444U patent/DE29517444U1/en not_active Expired - Lifetime
- 1995-11-10 JP JP7292967A patent/JPH09139108A/en active Pending
-
1996
- 1996-10-02 ES ES96115779T patent/ES2191074T3/en not_active Expired - Lifetime
- 1996-10-02 DE DE59610111T patent/DE59610111D1/en not_active Expired - Fee Related
- 1996-10-02 EP EP96115779A patent/EP0771997B1/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE59610111D1 (en) | 2003-03-13 |
| ES2191074T3 (en) | 2003-09-01 |
| DE29517444U1 (en) | 1995-12-21 |
| JPH09139108A (en) | 1997-05-27 |
| EP0771997A1 (en) | 1997-05-07 |
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